Kjooc



(No Medel.)

C.` E. SCRIBNER.

FASTENBR FOR SPRING JAGKS 0F SWITCH BOARDS. 110.459,711. Patented Sept.15, 1891.

UNITED STATES PATENT OEETCE..

CHARLES E. SCRIBNER, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE WESTERNELECTRIC COMPANY, OF SAME PLACE.

FASTENER FOR SPRING-JACKS OF SWITCH-BOARDS.

SPECIFICATION forming part of Letters Patent No. 459,711, datedSeptember 15, 1891.

Application filed May 7, 1891. Serial No. 391,990. (No model.)

.T all whom t may concern.-

Be it known that I, CHARLES E. SOEIBNER, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented a certain new and useful Improvement in Fasteners forSpring-Jacks of Switch-Boards, (Case 267,) of which the following is afull, clear, concise, and exact description, reference being had to theaccomro partying drawings, forming a part of this specification.

My invention relates to the construction of switch-boards fortelephone-exchanges.

Its object is to provide suitable means I5 whereby the spring-jacks maybe quickly and firmly secured in their places in the switchboards orreadily removed when necessary. Since in a telephone switch-board thenumber of subscribers whose lines may be connected 2O to one board islimited to the area over which an operator can reach readily to makeconnections,'in large exchanges it becomes of material importance toarrange the connecting spring-jacks of the subscribers line as z5compactly as possible; but any small group of spring-jacks must becapable of ready removal for repairs without disturbing the otherspring-jacks of the switch-board- My invention is designed to afford acompact arrangement of the spring-jacks and still leave the groups ofspring-jacks readily removable.

My invention may be briefly described as follows: In ordinary practiceseveral, frequently twenty, subscribers line-jacks are mounted in asingle block of insulating material and the group is known asa strip Alarge number of these strips are arranged one above the other in a panelof the switch-boards, means 4o being provided at the ends of each stripfor securing it to a frame. A

In my invention the partition separating adjacent panels is perforated,one hole being placed opposite the end of each strip of springjacks. Ashort pin extends through the partition and projects a slight distanceon either side into holes in the ends of the strips of spring-jacks. Theholes in the ends of the strips are made of such a depth that the pin 5owhich ordinarily projects into it may be displaced so far into the holeas not to project on the opposite side of the partition. The end of thestrip on the other side of the partition is thus released and when thepins which engage with both the ends of the stri-p are similarlydisengaged the strip may be removed. Slots extending from the front edgeof the partition to the perforations through the partition allow ofaccess to the pins, and small holes drilled in the pins afford means 6oby which they may be shifted to one side or the other of thepartition,so as to release the strips on the one side or the other.

My invention will bev more readily under"i stood by reference to theaccompanying drawings, which are illustrative thereof.

Figure 1 of the drawings is a perspective view of a partition separatingtwo panels of spring-jacks and having several strips arA ranged onopposite sides of the partition,some 7o of them fastened in the mannerdescribed and some released for removal. Fig. 2 represents a strip ofspring-jacks having recesses in its ends to receive the pins. Fig. 3represents a portion of a section of switchboard equipped withspring-jacks arranged in accordance with my invention.

Like parts are indicated by similar letters of reference throughout thedifferent figures.

In Fig. l, c is the partition, preferably of 8o metal, perforated nearits front edge with holes b l) b. Slots are cut from the front edge ofthe partition to the perforations.

c c are strips of spring-jacks on opposite sides of the partition,having recesses e in their ends, as shown in Fig. 2. The pin CZ eX-tends through the partition and projects into the recesses e e in theends of the strips c c. Small holes fff are drilled in the pin d, intowhich a point may be inserted to shift the 9o pin to one side or theother. One of the pins g is shown displaced, so as to project into therecess in strip h. Its end on the other side of the partition is thusbrought ush with the face of the partition, and the strip h is disvengaged and may be slipped forward or backward and removed either fromthe front or from the back o f the board. The strips of spring-jacksabove and below the strip 71, are not displaced by its removal. Thepartition roo a may be made very thin. I have found onefourth of an inchto be sufiicient. Hence little space is occupied by thesupporting-fra1ne ofthe switch-board, and great compactness ofarrangement of the spring-jacks is possible.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- 1. The combination, with strips of springjacksarranged in panels in a switch-board, of a partition separating adjacentpanels furnishedwithperforationsthroughthe partition, with pinsextending through the perforations and projecting on both sides of thepin into recesses in the ends of the strips of springjacks,substantially in the manner and for the purpose specified.

2. In combination, strips of spring-jacks arranged in panels in aswitch-board, a partition separating adjacent panels ot spring-jacks,perforations through the partition, pins eX- tending through theperforations and projecting on opposite sides of the partition, recessesin the ends of the strips of spring-jacks adapted to receive the pinsand of such depth as to allow the pin to be shifted until one of itsends does not project through the partition, and slots from the edge ofthe partition to the perforations, whereby access is allowed to thepins, substantially in the manner and for the purpose specified.

3. The combination of strips of spring-jacks arranged in panels, with apartition separating adjacent panels, and pins furnished with holes,whereby they may be shifted to one side and engaging with recesses inthe ends of strips of spring-jacks, substantially in the manner and forthe purpose specitied.

In witness whereof I hereunto subscribe my name this 25th day of April,A. D. 1891.

CHARLES E. SCRIBNER.

\Vitnesses:

ELLA EDLER, GEORGE L. CRAGG.

